Complete core transformer tests in renewables with less downtime

For field engineers and site technicians, the challenge is clear: how do you complete essential transformer tests quickly and accurately, without compromising safety or quality?

The TAU3 transformer winding analyser is designed to do just that. 

By combining multiple transformer tests into one workflow, it reduces site time, eliminates repeated setups, and helps you get assets back online faster.

Why downtime is a bigger challenge in renewables

In wind farms, access is often the bottleneck. Getting a team and equipment up a turbine tower or out to an offshore site takes time — so any extra trip or repeated climb adds hours to the schedule.

In solar farms, transformers may be spread across vast areas, requiring long walks or vehicle trips between units. Each move adds to site time and can delay the return to service.

When multiple test instruments or repeated lead changes are involved, the effect compounds. 

That’s more time in high-voltage zones, more handling of connections, and more chances for delays.

All core transformer tests — one streamlined workflow

With the TAU3, you can perform:

• Vector group confirmation
• Turns ratio and polarity
• Winding resistance
• Demagnetisation
• Short-circuit impedance
• Efficiency measurements

All without changing connections once you’re set up.

This one-time connection approach is especially valuable in renewables, where every setup change can mean:

• Extra climbs in wind towers
• Additional trips across solar fields
• Repositioning in cramped or hazardous spaces
   

Less handling, more testing

In a traditional setup, each test often requires disconnecting and reconnecting leads, changing instruments, or adjusting configurations. The TAU3 removes these steps by running tests sequentially from a single connection point.

This doesn’t just save minutes — over a day’s work, it can reclaim hours. That’s time you can use to complete more units, reduce downtime, or finish the job earlier.

Proven in renewable environments

Wind farm example:
A team is tasked with routine transformer testing on ten turbines. Using traditional methods, they need two to three climbs per turbine to complete all tests. With the TAU3, they make one climb, perform all tests in sequence, and export results before descending. The total climbs are reduced by more than half, saving hours in the schedule.

Solar farm example:
A technician moves between 15 pad-mounted transformers. Instead of carrying multiple instruments and repeating setups, they carry the TAU3 in its lightweight case, set up once per transformer, and complete all tests before moving on. The reduced handling improves throughput and limits exposure to high-voltage areas.

Built-in accuracy and assurance

The TAU3’s automatic vector confirmation checks your transformer’s vector group before each test. On-screen vector diagrams and colour-coded clamps help ensure correct connections, even in low light or awkward positions.

With true three-phase output, all windings are energised and measured at the same time — improving both accuracy and repeatability. You get results you can trust, without rework.
 

TAU3's vector confirmation

The business case for less downtime

Reducing downtime benefits every stakeholder:

• Asset owners: Faster return to service means less lost generation revenue.
• Maintenance contractors: Shorter jobs free up resources for other projects.
• Technicians: Less climbing, carrying, and high-voltage exposure improves safety and reduces fatigue.

And with USB export and PowerDB integration, results can be shared immediately for faster decision-making.

Decision made easy

At the decision stage, it’s about evidence — and the TAU3’s workflow has been proven to save time and reduce risk in real renewable environments. 

If your team is looking to work faster, safer, and with less downtime, a one-time connection workflow is the logical next step.

Reduce downtime in renewable energy systems. Ask our expert team for more details here